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Code of Federal Regulations (Last Updated: July 5, 2024) |
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Title 40 - Protection of Environment |
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Chapter I - Environmental Protection Agency |
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SubChapter U - Air Pollution Controls |
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Part 1042 - Control of Emissions from New and in-Use Marine Compression-Ignition Engines and Vessels |
Appendix II to Part 1042 - Steady-State Duty Cycles
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Appendix II to Part 1042 - Steady-State Duty Cycles
(a) The following duty cycles apply as specified in § 1042.505(b)(1):
(1) The following duty cycle applies for discrete-mode testing:
E3 mode No. Engine speed1 Percent of
maximum
test powerWeighting
factors1 Maximum test speed 100 0.2 2 91% 75 0.5 3 80% 50 0.15 4 63% 25 0.15 (2) The following duty cycle applies for ramped-modal testing:
RMC
modeTime in mode
(seconds)Engine
speed1 3Power
(percent)2 31a Steady-state 229 Maximum test speed 100%. 1b Transition 20 Linear transition Linear transition in torque. 2a Steady-state 166 63% 25%. 2b Transition 20 Linear transition Linear transition in torque. 3a Steady-state 570 91% 75%. 3b Transition 20 Linear transition Linear transition in torque. 4a Steady-state 175 80% 50%. (b) The following duty cycles apply as specified in § 1042.505(b)(2):
(1) The following duty cycle applies for discrete-mode testing:
E5 mode No. Engine
speed1Percent of
maximum
test powerWeighting
factors1 Maximum test speed 100 0.08 2 91% 75 0.13 3 80% 50 0.17 4 63% 25 0.32 5 Warm idle 0 0.3 (2) The following duty cycle applies for ramped-modal testing:
RMC
modeTime in mode
(seconds)Engine
speed1 3Power
(percent)2 31a Steady-state 167 Warm idle 0. 1b Transition 20 Linear transition Linear transition in torque. 2a Steady-state 85 Maximum test speed 100%. 2b Transition 20 Linear transition Linear transition in torque. 3a Steady-state 354 63% 25%. 3b Transition 20 Linear transition Linear transition in torque. 4a Steady-state 141 91% 75%. 4b Transition 20 Linear transition Linear transition in torque. 5a Steady-state 182 80% 50%. 5b Transition 20 Linear transition Linear transition in torque. 6 Steady-state 171 Warm idle 0. (c) The following duty cycles apply as specified in § 1042.505(b)(3):
(1) The following duty cycle applies for discrete-mode testing:
E2 mode No. Engine
speed1Torque
(percent)2Weighting
factors1 Engine Governed 100 0.2 2 Engine Governed 75 0.5 3 Engine Governed 50 0.15 4 Engine Governed 25 0.15 (2) The following duty cycle applies for ramped-modal testing:
RMC mode Time in mode
(seconds)Engine speed Torque
(percent)1 21a Steady-state 229 Engine Governed 100%. 1b Transition 20 Engine Governed Linear transition. 2a Steady-state 166 Engine Governed 25%. 2b Transition 20 Engine Governed Linear transition. 3a Steady-state 570 Engine Governed 75%. 3b Transition 20 Engine Governed Linear transition. 4a Steady-state 175 Engine Governed 50%. [81 FR 74156, Oct. 25, 2016]